Armature for dynamo-electric machines or electric motors



(No Model.)

H. HICKS. ARMATURE FOR DYNAMO ELECTRIC MAGEINES 0R ELEGIRIG MOTORS. No. 518,756. Patented Apr. 24, 1894.

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THOMAS H. HICKS, OF DETROIT, MICHIGAN.

ARMATURE FOR DYNAMOELECTRIC MACHINES R ELECTRIC MOTORS,

SPECIFICATION forming part of Letters Patent No. 518,756, dated April 24, 1894.

Application filed January 9, 1893. 7 Serial No. 457,811- (No model.)

To all whom it may concern: 3 shows a similar manner of connecting the Be it known that I, THOMAS H. HICKS, a commutator segments in a-multi-polar masubject ofthe Queen of GreatBritain, residing chine having eight inducing magnets with at Detroit, county of-Wayne, State of Michione pair of collecting brushes. But when I 5 gan, have invented a certain new and useful use this armature in a bi-polar machine I Improvementin Electrical Armatures and the then dispense with the commutator cross con- Oonnections of a Oommutator'lherewith; and nections, shown in Figs. 3 and 4. I declare the following to be afull, clear, and Turning more especially, first, to Fig. 1, A exact description of the invention, such as is the shaft upon which the armature is con to will enable others skilled in the art to which structed. B B are two circular flanges or it appertains to make and use the same, referheads forming the ends of the armature. encebeinghad totheaccompanyingdrawings, These I prefer to shrink tightly upon the which form a part of this specification. V shaft A, after which they are turned off in a This invention relates to new and useful lathe, so as to be balanced during rotation.

I 5 improvements in the construction of arma- Equidistantfrom theshaft, and paralleltheretures, for dynamo electric machines, and elecwith, are supporting bolts 0, which serve to tric motors, of either continuous or alternatkeep the flanges or heads B from spreading ing current types, the only necessary change. apart'and at the same time forma non-shrinkfor different types being in the plan of conable support. for the iron wire cylinder F.

20 necting the armature coils with each other Each bolt is insulated at one end where it and with the collector; which may be done in passes through the flanges or head, The inany suitable manner agreeing with the type sulation is marked D. After the bolts are seof machine constructed, as will be readily uncured in place, they are'turned off in a lathe derstood by those skilled in the art. on the outer portion between the flanges.

2 5 The following is a full, clear and'exact de- Between the flanges and radially from the scription of my invention; reference being shaft, as far as the outer surfaceof the bolts,

had to the accompanying sheet of drawings, the armature'is filledwith any good non-conin which I ducting material, such as cement, plaster of Figure 1 is a horizontal section, showing .p'aris or Wood secured to the ends of the 0 the internal construction of the armature and flanges. I prefer plaster of paris. After the one side of two armature bobbins arranged filling is in place, the portion of the armature diametrically opposite one another. Fig. 2 so far completed is put in a lathe and the is aperspective View of a laminated iron non-conducting material turned off until the core used in each of the armature bobbins reouter surface of the bolts is reached. This 5 ferred to in Fig. 1. I Fig. 3 is an endview of non-conducting material is marked E. Upon acomplete armature having sixteen armature the bolts 0- and non-conducting material 'E, bobbins, connected to an equal number of I next wind iron wire, so as to form a magcommutator segments, and showing in dotted netizable cylinder F. The bolts form a per- 0 lines, an iron wire cylinder which forms-a part manent support for the cylinder in case 40 of the magnetic circuit of the laminated iron shrinkage should occur in the non-conductcores of the bobbins, one iron core being left' ing material after use. The non-conducting unwound. Fig. l-is also an end view of Fig. material is used only to form a foundation .1, showing in diagram the manner of connectuponwhich to wind the wire F. Upon the 5 ing the armature bobbins with each other and inner surface of each flange B, ator near the 5 with the commutator segments for collecting periphery, I turn an annular groove, marked currents having only one direction. This fig- G. I prefer to construct the groove in the ure also shows six inducing magnets partly form of a dove-tail, as shown, although the cut away, and the commutator segments shape of the groove is a matter of choice. I rco joined together in sets, by cross connections, next arrange a number of laminated iron 50 appropriate fora continuous current'mutipocores H equidistant from each other in the lar machine having six field of force magnets grooves G. These cores H may be placed in and using only two collecting brushes. Fig. the grooves G in any proper manner, as by being sprung in place one or two at a time, or a slot may be cut from the outer portion of the groove to the inner, and the thin piece then slid through the slot into proper place. The laminae of each core are coated with shellac, and when dried by heat they unite to form a solid core H, as shown in Fig. 2. The cores I-I maybe securely held equidistant from each other by wood or other suitable material, placed in the groove G, between each core, as shown at g. The number of cores H required in the construction of the armature, will be governed by the number of field magnets used in the machine. The number of cores used should be divisible by the number of field magnets without a remainder. The cores H are next wound lengthwise with insulated copper wire, as shown in Figs. 1, 3 and 4, and the ends of the bobbins are joined to each other, so as to form a symmetrical winding, having two paths for the current to travel, as shown in Figs. 3 and 4. The bobbins of copper wire are marked I, in Figs. 1, 3, and 4.

J in Figs. 1 and 3, represents a band of wire to assist in holding the cores II and bobbins of wire I in place.

The essential features of my present in vention are: first, in forming a double support for the iron wire cylinder F; one being composed of a non-conducting substance, such as plaster of paris, and the other of a non-shrinkable substance, such as the iron bolts 0 second, separate laminated iron cores H; the laminae being arranged parallel to the shaft of the armature. In this way the cores may be cheaply made; there being little or no waste in cutting up a sheet of iron; third, the manner of securing and holding the cores H in place radially around the iron cylinder, by the annular groove G, which, together with the wire band J, unite to resist centrifugal force, the cylinder and cores thus uniting to form the armature magnetic circuit. I wish it to be understood that the wire band J does more than hold the copper wire in place, as in the case of other armatures; it assists very importantly in holding the iron cores II against centrifugal force. This is not the case with other armatures; therefore, the band J forms an important factor in my invention. Fourth, forming the magnetic circuit of the armature of separate pieces; such as the ring F and cores H. In this way, burned out coils are easily replaced; and not only that but the terminals of the bobbins being easily accessible, an armature can be changed to suit eithera bi-polar or multi-polar continuous current machine, or, an alternating current machine, in a manner which will be readily understood by those skilled in the art. There are several other minor features which I embrace in my claims.

What I claim as my invention is 1. In an electric machine, an armature consisting of a shaft, heads B B, non-conducting material E about the shaft, supports 0, a wire cylinder F, and cores II, each wound with wire bobbins, substantially as described.

2. In an electric machine, an armature consisting of a shaft, heads B B secured to the shaft, non conducting material about the shaft, and a wire cylinder F located about said non-conducting material, substantially as described.

3. In an electric machine, an armature consisting of a shaft, heads B B secured to said shaft, cores H non-conducting material E about the shaft, a wire cylinder F located about said non-conducting material, and coils I located parallel to the shaft, said heads constructed with annular grooves to hold the cores of said coils, substantially as described.

4. In an electric machine, an armature havin g laminated cores arranged parallel to and radially about the armature shaft, and a mag netizable cylinder, said cores being also ar' ranged radially around said cylinder, substantially as described.

5. In an electric machine, an armature having a shaft A, flanges B, B secured to the shaft, provided with grooves G, and cores H, laminated in adirection parallel to the shaft and the ends of the cores being arranged in said grooves, substantially as described.

6. In an electric machine, an armature having a magnetizable cylinder F supported to rotate with the shaft by flanges B and nonconducting material E, substantially as described.

7. In an electric machine,a magnctizable cylinder F, an armature having laminated cores H arranged upon said cylinder, and a band J wound upon said cores, substantially as described.

8. In an electric machine the combination of an armature, and pairs of field magnets, the armature having cores laminated in a direction parallel to the shaft of the armature and wound with bobbins of Wire I, the field magnets arranged alternately of opposite magnetic sign around said armatu re,substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

THOMAS H. HICKS.

Witnesses:

N. S. VVRIG-HT, JOHN F. MILLER.

lIO 

